#include<iostream>
#include<cstdlib>
#include<stdio.h>
#include<cstring>
#include<fstream>
int E[48] = { 32,1,2,3,4,5,4,5,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,18,19,20,21,20,21,22,23,24,25,24,25,26,27,28,29,28,29,30,31,32,1 };
int Pc[32] = { 9,17,23,31,13,28,2,18,24,16,30,6,26,20,10,1,8,14,25,3,4,29,11,19,32,12,22,7,5,27,15,21 };
int PC1c[64] = { 8,16,24,56,52,44,36,57,7,15,23,55,51,43,35,58,6,14,22,54,50,42,34,59,5,13,21,53,49,41,33,60,4,12,20,28,48,40,32,61,3,11,19,27,47,39,31,62,2,10,18,26,46,38,30,63,1,9,17,25,45,37,29,64 };
int PCr[48] = { 14,17,11,24,1,5,3,28,15,6,21,10,23,19,12,4,26,8,16,7,27,20,13,2,41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42,50,36,29,32 };
int P[32] = { 16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25 };
int S[8][4][16] = { {{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},{0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},{4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},{15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}}\
    ,{{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},{3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},{0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},{13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}}\
    ,{{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},{13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},{13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},{1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}}\
    ,{{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},{13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},{10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},{3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}}\
    ,{{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},{14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},{4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},{11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}}\
    ,{{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},{10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},{9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},{4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}}\
    ,{{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},{13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},{1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},{6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}}\
    ,{{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},{1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},{7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},{2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}
};
int PC2c[56] = { 5,24,7,16,6,10,20,18,49,12,3,15,23,1,9,19,2,50,14,22,11,51,13,4,52,17,21,8,47,31,27,48,35,41,53,46,28,54,39,32,25,44,55,37,34,43,29,36,38,45,33,26,42,56,30,40 };
using namespace std;
class hexbin//16进制的数转换为2进制的数
private:
    char a[26], count, i, j, e;
    int bin[16][4];
public:
    int c[64];
    int* bina(int n)
    {
        count = 0;
        cout << "请输入16进制的数" << n << "：";
        cin >> a;
        for (i = 0; a[i] != '\0'; i++)//每个字符对应相应的四位的二进制数
        {
            switch (a[i])
            {
            case'0':
                bin[i][0] = 0;
                bin[i][1] = 0;
                bin[i][2] = 0;
                bin[i][3] = 0;
                break;
            case'1':
                bin[i][0] = 0;
                bin[i][1] = 0;
                bin[i][2] = 0;
                bin[i][3] = 1;
                break;
            case '2':
                bin[i][0] = 0;
                bin[i][1] = 0;
                bin[i][2] = 1;
                bin[i][3] = 0;
                break;
            case '3':
                bin[i][0] = 0;
                bin[i][1] = 0;
                bin[i][2] = 1;
                bin[i][3] = 1;
                break;
            case '4':
                bin[i][0] = 0;
                bin[i][1] = 1;
                bin[i][2] = 0;
                bin[i][3] = 0;
                break;
            case '5':
                bin[i][0] = 0;
                bin[i][1] = 1;
                bin[i][2] = 0;
                bin[i][3] = 1;
                break;
            case '6':
                bin[i][0] = 0;
                bin[i][1] = 1;
                bin[i][2] = 1;
                bin[i][3] = 0;
                break;
            case '7':
                bin[i][0] = 0;
                bin[i][1] = 1;
                bin[i][2] = 1;
                bin[i][3] = 1;
                break;
            case '8':
                bin[i][0] = 1;
                bin[i][1] = 0;
                bin[i][2] = 0;
                bin[i][3] = 0;
                break;
            case '9':
                bin[i][0] = 1;
                bin[i][1] = 0;
                bin[i][2] = 0;
                bin[i][3] = 1;
                break;
            case 'A':
                bin[i][0] = 1;
                bin[i][1] = 0;
                bin[i][2] = 1;
                bin[i][3] = 0;
                break;
            case 'B':
                bin[i][0] = 1;
                bin[i][1] = 0;
                bin[i][2] = 1;
                bin[i][3] = 1;
                break;
            case 'C':
                bin[i][0] = 1;
                bin[i][1] = 1;
                bin[i][2] = 0;
                bin[i][3] = 0;
                break;
            case 'D':
                bin[i][0] = 1;
                bin[i][1] = 1;
                bin[i][2] = 0;
                bin[i][3] = 1;
                break;
            case 'E':
                bin[i][0] = 1;
                bin[i][1] = 1;
                bin[i][2] = 1;
                bin[i][3] = 0;
                break;
            case 'F':
                bin[i][0] = 1;
                bin[i][1] = 1;
                bin[i][2] = 1;
                bin[i][3] = 1;
                break;
            default:
                exit(-1);
            }
            count++;
        }
        e = 0;
        for (i = 0; i < 16; i++) //组合成一个数组
        {
            for (j = 0; j < 4; j++)
            {
                c[e] = bin[i][j];
                e++;
            }
        }
        memset(bin, 0, sizeof(int) * 64);//重置数组
        memset(a, 0, sizeof(char) * 26);
        return c;
    }
};
class kborn
{
private:
    int i, j, dd, d[56], C[20][28], D[20][28], a, CD[56], c, b, ee, cc, e, bin[8], bina[8], Bbin[8], CDC[56];
public:
    int ke[48];
    int* ki(int qs, int n, int* CDC)
    {
        for (j = 0; j < 8; j++) //把值转换为二进制
        {
            cc = qs / 2;
            bin[j] = qs % 2;
            qs = cc;
            if (qs == 0)//化到最后都会从2或1化到0
            {
                for (dd = j + 1; dd < 8; dd++) //补位添0,成为8bit
                {
                    bin[dd] = 0;
                }
                for (ee = 7; ee >= 0; ee--)
                {
                    bina[7 - ee] = bin[ee];
                }
                break;
            }
        }
        for (j = 0; j < 8; j++)
        {
            Bbin[j] = bina[j];
        }
        CDC[0] = Bbin[0];
        CDC[12] = Bbin[1];
        CDC[21] = Bbin[2];
        CDC[25] = Bbin[3];
        CDC[29] = Bbin[4];
        CDC[38] = Bbin[5];
        CDC[41] = Bbin[6];
        CDC[46] = Bbin[7];
        for (i = 0; i < 28; i++)//划分成两段每段28bit
        {
            C[0][i] = CDC[i];
        }
        for (i = 28; i < 56; i++)
        {
            D[0][i - 28] = CDC[i];
        }
        for (i = 1; i <= n; i++)//循环移位
        {
            if (i == 1 || i == 2)//移一位
            {
                a = C[i - 1][0];
                c = D[i - 1][0];
                for (j = 0; j < 27; j++)//左循环移位一位
                {
                    C[i][j] = C[i - 1][j + 1];
                    D[i][j] = D[i - 1][j + 1];
                }
                C[i][j] = a;
                D[i][j] = c;
            }
            else//移两位
            {
                a = C[i - 1][0];
                b = D[i - 1][0];
                c = C[i - 1][1];
                e = D[i - 1][1];
                for (j = 0; j < 26; j++)//左循环移位两位
                {
                    C[i][j] = C[i - 1][j + 2];
                    D[i][j] = D[i - 1][j + 2];
                }
                C[i][j] = a;
                D[i][j] = b;
                C[i][j + 1] = c;
                D[i][j + 1] = e;
            }
        }
        for (j = 0; j < 28; j++)//两个28bit合并为一段56比特
        {
            CD[j] = C[i - 1][j];
        }
        for (j = 28; j < 56; j++)
        {
            CD[j] = D[i - 1][j - 28];
        }
        for (j = 0; j < 48; j++)//进行PC-2置换生成密钥
        {
            ke[j] = CD[PCr[j] - 1];
        }
        return ke;
    }
};
int main()
{
    int i, j, e, b, qs, m[64], L[20][32], K[20][48], EA[48], R[20][32], N, a[12][64], m1[64], M[64], CDC[64], L0[12][32], L3[12][32], R3[12][32], EL3[12][48], ELc[6][48], Ec[6][8][6], R3c[6][32], L0c[6][32], R3L0[6][32];
    int d, CSS, js, hang, lie, dd, ee, jj, CD[56], CDc[56], Cc[6][32], Ccf[6][8][4], bin[6], bina[6], CS, CS1, binar[6], bin1[4], bin2[4], BIN[4], binary[8][64][6], Bbin[6], count[8][64];
    int cc, C[8], B[48], ges, duis, binbin[8][4], Pt[32], T[32];
    hexbin hbin;
    kborn kefe;
    cout << "请输入要输入明文的对数：";
    cin >> duis;
    ges = 2 * duis;
    cout << "请输入明文：\n";
    for (j = 0; j < ges; j++) //将16进制明文转换为二进制
    {
        int* c = hbin.bina(j + 1);
        for (i = 0; i < 64; i++)
        {
            a[j][i] = c[i];
        }
    }
    for (j = 0; j < ges; j++)
    {
        cout << "\n明文" << j + 1 << "是：";
        for (i = 0; i < 64; i++)
        {
            cout << a[j][i];
            if ((i + 1) == 32)
                cout << "\t";
        }
    }
    for (i = 0; i < 64; i++)//把第一个明文复制给m1用于穷搜
    {
        m1[i] = a[0][i];
    }
    for (j = 0; j < ges; j++) //生成L0
    {
        for (i = 0; i < 32; i++)
        {
            L0[j][i] = a[j][i];
        }
    }
    memset(a, 0, sizeof(int) * 640);
    cout << endl;
    cout << "\n请输入密文：\n";
    for (j = 0; j < ges; j++) //将16进制密文转换为二进制
    {
        int* c = hbin.bina(j + 1);
        for (i = 0; i < 64; i++)
        {
            a[j][i] = c[i];
        }
    }
    for (i = 0; i < 64; i++)//把第一个密文复制给m1用于穷搜
    {
        M[i] = a[0][i];
    }
    for (j = 0; j < ges; j++) //生成L3
    {
        cout << "\n密文L" << j + 1 << "是：";
        for (i = 0; i < 32; i++)
        {
            L3[j][i] = a[j][i];
            cout << L3[j][i];
        }
        cout << "\t密文R" << j + 1 << "是：";
        for (i = 32; i < 64; i++)
        {
            R3[j][i - 32] = a[j][i];
            cout << R3[j][i - 32];
        }
    }
    cout << endl;
    for (i = 0; i < ges; i++) //进行E扩展置换
    {
        cout << "\n进行E扩展置换后的值ER" << i + 1 << "是：";
        for (j = 0; j < 48; j++)
        {
            EL3[i][j] = L3[i][E[j] - 1];
            cout << EL3[i][j];
        }
    }
    cout << endl;
    for (i = 0; i < ges;) //计算输入差分
    {
        for (j = 0; j < 48; j++)
        {
            if (EL3[i][j] == EL3[i + 1][j])
                ELc[i / 2][j] = 0;
            else
                ELc[i / 2][j] = 1;
        }
        i = i + 2;
    }
    for (i = 0; i < duis; i++)
    {
        cout << "\n第" << i + 1 << "对输入异或是：";
        for (j = 0; j < 48; j++)
        {
            cout << ELc[i][j];
        }
    }
    for (i = 0; i < duis; i++) //分组，每组6bit
    {
        for (j = 0; j < 48;)
        {
            for (e = 0; e < 6; e++)
            {
                Ec[i][j / 6][e] = ELc[i][e + j];
            }
            j = j + 6;
        }
    }
    for (i = 0; i < ges;) //计算差分R3c
    {
        for (j = 0; j < 32; j++)
        {
            if (R3[i][j] == R3[i + 1][j])
                R3c[i / 2][j] = 0;
            else
                R3c[i / 2][j] = 1;
        }
        i = i + 2;
    }
    for (i = 0; i < ges;) //计算差分L0c
    {
        for (j = 0; j < 32; j++)
        {
            if (L0[i][j] == L0[i + 1][j])
                L0c[i / 2][j] = 0;
            else
                L0c[i / 2][j] = 1;
        }
        i = i + 2;
    }
    for (i = 0; i < duis; i++) //计算R3c和L0c的差分
    {
        for (j = 0; j < 32; j++)
        {
            if (R3c[i][j] == L0c[i][j])
                R3L0[i][j] = 0;
            else
                R3L0[i][j] = 1;
        }
    }
    for (i = 0; i < duis; i++) //P逆置换计算输出差分Cc
    {
        for (j = 0; j < 32; j++)
        {
            Cc[i][j] = R3L0[i][Pc[j] - 1];
        }
    }
    cout << endl;
    for (i = 0; i < duis; i++) //P逆置换计算输出差分Cc
    {
        cout << "\n第" << i + 1 << "对输出异或是：";
        for (j = 0; j < 32; j++)
        {
            cout << Cc[i][j];
        }
    }
    for (i = 0; i < duis; i++) //分组，每组4bit
    {
        for (j = 0; j < 32;)
        {
            for (e = 0; e < 4; e++)
            {
                Ccf[i][j / 4][e] = Cc[i][e + j];
            }
            j = j + 4;
        }
    }
    cout << endl;
    for (i = 0; i < duis; i++) //分段输出 输入异或
    {
        cout << "\n第" << i + 1 << "对输入异或\n";
        cout << 1 << "\t" << 2 << "\t" << 3 << "\t" << 4 << "\t" << 5 << "\t" << 6 << "\t" << 7 << "\t" << 8 << "\n";
        for (j = 0; j < 8; j++)
        {
            for (e = 0; e < 6; e++)
            {
                cout << Ec[i][j][e];
            }
            cout << "\t";
        }
    }
    cout << endl;
    for (i = 0; i < duis; i++) //分段输出 输出异或
    {
        cout << "\n第" << i + 1 << "对输出异或\n";
        cout << 1 << "\t" << 2 << "\t" << 3 << "\t" << 4 << "\t" << 5 << "\t" << 6 << "\t" << 7 << "\t" << 8 << "\n";
        for (j = 0; j < 8; j++)
        {
            for (e = 0; e < 4; e++)
            {
                cout << Ccf[i][j][e];
            }
            cout << "\t";
        }
    }
    cout << endl;
    memset(count, 0, sizeof(int) * 512);
    for (dd = 0; dd < 8; dd++) //依次按照S盒来检验找出合适的输入
    {
        for (i = 0; i < 64; i++)//测试输入6bit，循环检验，找出符合IN（）的输入
        {
            CSS = i;
            memset(bina, 0, sizeof(int) * 6);
            memset(bin, 0, sizeof(int) * 6);
            memset(Bbin, 0, sizeof(int) * 6);
            for (j = 0; j < 6; j++) //把值转换为二进制
            {
                b = CSS / 2;
                bin[j] = CSS % 2;
                CSS = b;
                if (CSS == 0)//化到最后都会从2或1化到0
                {
                    for (d = j + 1; d < 6; d++) //补位添0,成为6bit
                    {
                        bin[d] = 0;
                    }
                    for (e = 5; e >= 0; e--)
                    {
                        bina[5 - e] = bin[e];
                    }
                    break;
                }
            }
            for (j = 0; j < 6; j++)
            {
                Bbin[j] = bina[j];
            }
            memset(bin, 0, sizeof(int) * 6);
            hang = bina[0] * 2 + bina[5];
            lie = bina[1] * 8 + bina[2] * 4 + bina[3] * 2 + bina[4];
            CS = S[dd][hang][lie];
            memset(bina, 0, sizeof(int) * 6);
            memset(bin, 0, sizeof(int) * 6);
            memset(bin1, 0, sizeof(int) * 4);
            for (j = 0; j < 4; j++) //把值转换为二进制
            {
                b = CS / 2;
                bin[j] = CS % 2;
                CS = b;
                if (CS == 0)//化到最后都会从2或1化到0
                {
                    for (d = j + 1; d < 4; d++) //补位添0,成为4bit
                    {
                        bin[d] = 0;
                    }
                    for (e = 3; e >= 0; e--)
                    {
                        bina[3 - e] = bin[e];
                    }
                    break;
                }
            }
            for (j = 0; j < 4; j++)
            {
                bin1[j] = bina[j];
            }
            for (jj = 0; jj < duis; jj++)//检验不同对的值
            {
                for (j = 0; j < 6; j++) //输入和输入异或两者异或
                {
                    if (Bbin[j] == Ec[jj][dd][j])
                        binar[j] = 0;
                    else
                        binar[j] = 1;
                }
                hang = binar[0] * 2 + binar[5];
                lie = binar[1] * 8 + binar[2] * 4 + binar[3] * 2 + binar[4];
                CS1 = S[dd][hang][lie];
                memset(bin2, 0, sizeof(int) * 4);
                memset(bin, 0, sizeof(int) * 6);
                memset(bina, 0, sizeof(int) * 6);
                for (j = 0; j < 4; j++) //把值转换为二进制
                {
                    b = CS1 / 2;
                    bin[j] = CS1 % 2;
                    CS1 = b;
                    if (CS1 == 0)//化到最后都会从2或1化到0
                    {
                        for (d = j + 1; d < 4; d++) //补位添0,成为4bit
                        {
                            bin[d] = 0;
                        }
                        for (e = 3; e >= 0; e--)
                        {
                            bina[3 - e] = bin[e];
                        }
                        break;
                    }
                }
                for (j = 0; j < 4; j++)
                {
                    bin2[j] = bina[j];
                }
                memset(BIN, 0, sizeof(int) * 4);
                for (j = 0; j < 4; j++)
                {
                    if (bin1[j] == bin2[j])
                        BIN[j] = 0;
                    else
                        BIN[j] = 1;
                }
                if ((BIN[0] == Ccf[jj][dd][0]) && (BIN[1] == Ccf[jj][dd][1]) && (BIN[2] == Ccf[jj][dd][2]) && (BIN[3] == Ccf[jj][dd][3]))//判断是不是满足IN的条件
                {
                    for (j = 0; j < 6; j++)
                    {
                        if (Bbin[j] == EL3[2 * jj][(dd * 6 + j)])//满足的话和Ei异或得到密钥
                            binary[dd][i][j] = 0;
                        else
                            binary[dd][i][j] = 1;
                    }
                    js = binary[dd][i][0] * 32 + binary[dd][i][1] * 16 + binary[dd][i][2] * 8 + binary[dd][i][3] * 4 + binary[dd][i][4] * 2 + binary[dd][i][5];
                    count[dd][js] = count[dd][js] + 1;//计数器，计算可能密钥出现的位置和次数
                }
            }
        }
    }
    cout << endl;
    for (dd = 0; dd < 8; dd++)
    {
        cout << "\n\nS" << dd + 1 << ":\n";
        for (i = 0; i < 64; i++)
        {
            cout << count[dd][i];
            if ((i + 1) % 16 == 0)
                cout << "\n";
        }
    }
    cout << endl << "得到的第3轮加密的48bit密钥为：\n";
    for (dd = 0; dd < 8; dd++)//输出二进制结果
    {
        for (i = 0; i < 64; i++)
        {
            if (count[dd][i] == duis)
            {
                CSS = i;
                for (j = 0; j < 6; j++) //把值转换为二进制
                {
                    b = CSS / 2;
                    bin[j] = CSS % 2;
                    CSS = b;
                    if (CSS == 0)//化到最后都会从2或1化到0
                    {
                        for (d = j + 1; d < 6; d++) //补位添0,成为6bit
                        {
                            bin[d] = 0;
                        }
                        for (e = 5; e >= 0; e--)
                        {
                            bina[5 - e] = bin[e];
                        }
                        break;
                    }
                }
                for (e = 0; e < 6; e++)
                {
                    cout << bina[e];
                }
                cout << "\t";
            }
        }
        for (jj = 0; jj < 6; jj++)//合并为一个数组
        {
            CDc[(jj + 6 * dd)] = bina[jj];
        }
    }
    for (i = 48; i < 56; i++)//赋值给数组以便逆置换得到56bit的中间密钥
    {
        CDc[i] = 6;
    }
    for (i = 0; i < 56; i++)//PC2逆置换得到中间值
    {
        CD[i] = CDc[PC2c[i] - 1];
    }
    dd = CD[27];
    jj = CD[26];
    e = CD[25];
    CSS = CD[24];
    for (i = 27; i >= 4; i--)
    {
        CD[i] = CD[i - 4];
    }
    CD[3] = dd;
    CD[2] = jj;
    CD[1] = e;
    CD[0] = CSS;
    dd = CD[55];
    jj = CD[54];
    e = CD[53];
    CSS = CD[52];
    for (i = 55; i >= 32; i--)
    {
        CD[i] = CD[i - 4];
    }
    CD[31] = dd;
    CD[30] = jj;
    CD[29] = e;
    CD[28] = CSS;
    cout << endl << "最初加密的56bit密钥为：\n";
    for (i = 0; i < 56; i++)
    {
        cout << CD[i];
        if ((i + 1) % 14 == 0)
            cout << "\t";
    }
    for (i = 0; i < 56; i++)
    {
        CDC[i] = CD[i];
    }
    //分成两段每段32bit
    for (i = 0; i < 32; i++)
    {
        L[0][i] = m1[i];
    }
    for (i = 32; i < 64; i++)
    {
        R[0][i - 32] = m1[i];
    }
    for (qs = 0; qs < 256; qs++)
    {
        for (N = 1; N <= 3; N++)
        {
            int* ke = kefe.ki(qs, N, CDC);//生成48bit的密钥
            for (i = 0; i < 48; i++)
            {
                K[N][i] = ke[i];
            }
            for (i = 0; i < 32; i++) //把下一轮的L求出来
            {
                L[N][i] = R[N - 1][i];
            }
            for (i = 0; i < 48; i++) //将32比特R扩展成48比特
            {
                EA[i] = R[N - 1][E[i] - 1];
            }
            for (i = 0; i < 48; i++) //EA和K异或操作
            {
                if (EA[i] == K[N][i])
                    B[i] = 0;
                else
                    B[i] = 1;
            }
            for (i = 0; i < 48;) //求出Ci的值，并化为4bit的值，最终合并为一个32bit
            {
                hang = B[i] * 2 + B[i + 5];
                lie = B[i + 1] * 8 + B[i + 2] * 4 + B[i + 3] * 2 + B[i + 4];
                C[i / 6] = S[i / 6][hang][lie];
                i = i + 6;
            }
            for (j = 0; j < 8; j++)
            {
                e = C[j];
                for (i = 0; i < 4; i++) //把ASCII值转换为二进制
                {
                    b = e / 2;
                    binbin[j][i] = e % 2;
                    e = b;
                    if (e == 0)//化到最后都会从2或1化到0
                    {
                        for (cc = i + 1; cc < 4; cc++) //补位添0,成为4bit
                        {
                            binbin[j][cc] = 0;
                        }
                        break;
                    }
                }
            }
            cc = 0;
            for (j = 0; j < 8; j++) //32比特记录到一个数组中
            {
                for (i = 3; i >= 0; i--)
                {
                    Pt[cc] = binbin[j][i];
                    cc++;
                }
            }
            for (i = 0; i < 32; i++) //P置换退出f函数
            {
                T[i] = Pt[P[i] - 1];
            }
            for (i = 0; i < 32; i++) //L(i-1)和f函数输出异或操作得到Ri
            {
                if (T[i] == L[N - 1][i])
                    R[N][i] = 0;
                else
                    R[N][i] = 1;
            }
        }
        if ((M[0] == L[3][0]) && (M[1] == L[3][1]) && (M[2] == L[3][2]) && (M[3] == L[3][3]) && (M[4] == L[3][4]) && (M[5] == L[3][5]) && (M[6] == L[3][6]) && (M[7] == L[3][7]) && (M[8] == L[3][8]) && (M[9] == L[3][9]) && (M[10] == L[3][10]) && (M[11] == L[3][11]) && (M[12] == L[3][12]) && (M[13] == L[3][13])\
            && (M[14] == L[3][14]) && (M[15] == L[3][15]) && (M[16] == L[3][16]) && (M[17] == L[3][17]) && (M[18] == L[3][18]) && (M[19] == L[3][19]) && (M[20] == L[3][20]) && (M[21] == L[3][21]) && (M[22] == L[3][22]) && (M[23] == L[3][23]) && (M[24] == L[3][24]) && (M[25] == L[3][25]) && (M[26] == L[3][26])\
            && (M[27] == L[3][27]) && (M[28] == L[3][28]) && (M[29] == L[3][29]) && (M[30] == L[3][30]) && (M[31] == L[3][31]) && (M[32] == R[3][0]) && (M[33] == R[3][1]) && (M[34] == R[3][2]) && (M[35] == R[3][3]) && (M[36] == R[3][4]) && (M[37] == R[3][5]) && (M[38] == R[3][6]) && (M[39] == R[3][7])\
            && (M[40] == R[3][8]) && (M[41] == R[3][9]) && (M[42] == R[3][10]) && (M[43] == R[3][11]) && (M[44] == R[3][12]) && (M[45] == R[3][13]) && (M[46] == R[3][14]) && (M[47] == R[3][15]) && (M[48] == R[3][16]) && (M[49] == R[3][17]) && (M[50] == R[3][18]) && (M[51] == R[3][19]) && (M[52] == R[3][20])\
            && (M[53] == R[3][21]) && (M[54] == R[3][22]) && (M[55] == R[3][23]) && (M[56] == R[3][24]) && (M[57] == R[3][25]) && (M[58] == R[3][26]) && (M[59] == R[3][27]) && (M[60] == R[3][28]) && (M[61] == R[3][29]) && (M[62] == R[3][30]) && (M[63] == R[3][31]))
            break;
    }
    CDC[56] = 6;
    CDC[57] = 6;
    CDC[58] = 6;
    CDC[59] = 6;
    CDC[60] = 6;
    CDC[61] = 6;
    CDC[62] = 6;
    CDC[63] = 6;
    for (i = 0; i < 64; i++)
    {
        m[i] = CDC[PC1c[i] - 1];
    }
    cout << "\n\n\t\t穷搜得到64bit的密钥为：\n";
    for (i = 0; i < 64; i++)
    {
        cout << m[i];
        if ((i + 1) % 4 == 0)
            cout << "\t";
    }
    cout << "\n\t\t最后按照每一个字节含有奇数个1补全，就可以得到最终密钥！\n";
    system("PAUSE");
    return 0;
}